Black screen on all games after SSBB.

Ok, so I moded my Wii in 2010 using a guide on this site. I have USB launcher GX (updated). It all worked perfectly until yesterday when I tried to load Super Smash Bros. I never had SSBB on the disk before and when I tried to play it it the screen went black and reset back to homebrew. Now I get a black screen on every game.

I'm sorry if this has been asked a 1000 times but I just can't find a solution. And the problem is that I don't even know what I did back then to mod it since it was a Step by step guide that worked perfectly on the first try.